diff --git a/sys/net/if_vlan.c b/sys/net/if_vlan.c
index a3ec198c3f23..f5adc7c5355f 100644
--- a/sys/net/if_vlan.c
+++ b/sys/net/if_vlan.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: if_vlan.c,v 1.64 2010/01/19 22:08:01 pooka Exp $	*/
+/*	$NetBSD: if_vlan.c,v 1.65 2010/02/28 07:10:40 darran Exp $	*/
 
 /*-
  * Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
@@ -78,7 +78,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_vlan.c,v 1.64 2010/01/19 22:08:01 pooka Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_vlan.c,v 1.65 2010/02/28 07:10:40 darran Exp $");
 
 #include "opt_inet.h"
 
@@ -318,7 +318,7 @@ vlan_config(struct ifvlan *ifv, struct ifnet *p)
 		 */
 		if (ec->ec_capabilities & ETHERCAP_VLAN_HWTAGGING)
 			ifp->if_capabilities = p->if_capabilities &
-			    (IFCAP_TSOv4 |
+			    (IFCAP_TSOv4 | IFCAP_TSOv6 |
 			     IFCAP_CSUM_IPv4_Tx|IFCAP_CSUM_IPv4_Rx|
 			     IFCAP_CSUM_TCPv4_Tx|IFCAP_CSUM_TCPv4_Rx|
 			     IFCAP_CSUM_UDPv4_Tx|IFCAP_CSUM_UDPv4_Rx|